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A Novel Application of Nano Anticontamination Technology for Outdoor High‐Voltage Ceramic Insulators
Author(s) -
Zhuang Jiandong,
Liu Ping,
Dai Wenxin,
Fu Xianzhi,
Lin Han,
Zeng Wenlin,
Liao Fuwang
Publication year - 2010
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2009.02395.x
Subject(s) - materials science , insulator (electricity) , ceramic , arc flash , titanium dioxide , coating , calcination , composite material , photocatalysis , catalysis , biochemistry , chemistry
A novel application of a nano‐sized titanium dioxide (TiO 2 ) photocatalyst for improving the performance of the ceramic insulator under contaminated conditions is proposed in this paper. The TiO 2 ‐coated insulator was prepared by spraying a certain amount of TiO 2 sol on the ceramic insulator followed by subsequent calcination. The physical and chemical properties of the TiO 2 film were studied and their influences on the self‐cleaning and electrical performances of the ceramic insulator were evaluated. Compared with the uncoated insulators, the as‐prepared TiO 2 ‐coated insulator exhibited an enhanced self‐cleaning ability in a heavy polluted environment because of the excellent photo‐induced catalytic performance of the TiO 2 film. Moreover, the TiO 2 ‐coated insulators presents a flashover voltage level similar to normal ceramic insulators, and even a higher performance of wet flashover than the latter. It was proposed that the semiconducting property and the hydrophilicity of TiO 2 films could be responsible for the promoting effect on the electrical performances of the porcelain insulator. This study shows that coating TiO 2 films on the surface of insulators may have a promise in preventing pollution flashover.